--- old/src/hotspot/share/oops/instanceKlass.hpp	2017-09-28 12:22:49.339258011 +0200
+++ new/src/hotspot/share/oops/instanceKlass.hpp	2017-09-28 12:22:49.199258013 +0200
@@ -465,6 +465,7 @@
 
  public:
   int     field_offset      (int index) const { return field(index)->offset(); }
+  bool    field_flattened   (int index) const { return field(index)->is_flatten(); }
   int     field_access_flags(int index) const { return field(index)->access_flags(); }
   Symbol* field_name        (int index) const { return field(index)->name(constants()); }
   Symbol* field_signature   (int index) const { return field(index)->signature(constants()); }